patch 7.4.844

Problem:    When '#' is in 'isident' the is# comparator doesn't work.
Solution:   Don't use vim_isIDc(). (Yasuhiro Matsumoto)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    844,
 /**/
     843,
 /**/